Deceleration-dependent left bundle branch block: a spectrum of bundle branch conduction delay.

Deceleration-dependent left bundle branch block: a spectrum of bundle branch conduction delay.

The authors thank Dr. N.H.G. Holford, assistant professor of Medicine, Pharmacy and Pharmacological Chemistry, University of California, San Francisco, for his constructive review of this manuscript, and Dr. S. Lee, Director, Hematology Department, Cedars-Sinai Medical Center. In addition, we express our gratitude to Joye Nunn for secretarial assistance, to Lance Laforteza for graphics, and to ...

Tachycardia-dependent left bundle branch block associated with bradycardia-dependent variable left bundle branch block.

Tachycardia-Dependent Left Bundle Branch Block Associated with Bradyeardia-Dependent Variable Left Bundle Branch Block

This report describes tachyeardiaand bradycardia-dependent left bundle branch block in a patient who exhibited normal intraventricular conduction with impulses intermediate in timing. During bradyeardia, longer cycles were associated with increasing degrees of incomplete left bundle branch block. These clinical observations support the existence of slow Phase 4 depolarization of latent pacemake...

Left Bundle Branch Block

Coronary angiography, cine left ventriculography, and the cardiovascular hemodynamics of 24 patients with left bundle branch block were studied. Seven patients were found to have significant coronary artery disease, always severe. Five had cardiomyopathy and seven had valvular disease. Only those with coronary artery disease or cardiomyopathy had abnormal left ventricular contraction patterns. ...

Left bundle branch block.

A RECENT STUDY of the prognosis of patients with left bundle branch block (L.B.B.B.) suggested that life expectancy was extremely short (Smith and Hayes 1965). While in general L.B.B.B. has a sinister reputation, we have been struck by a few individuals who have survived many years with L.B.B.B., and we thought an analysis of some of the material available at the Royal Victoria Hospital, Belfas...